Encoding electrode in particular a wire electrode for the sparkerosive working

ABSTRACT

(A) In the prodn. of an erosion electrode, esp. a wire electrode for spark erosion cutting of conductive materials, comprising a metal (alloy) core and one or more sheath layers of low evapn. temp. alloy (e.g. Zn-Cu), the novelty is that an active sheath layer of the alloy with low evapn. temp. and limited cold formability is produced by annealing the wire electrode to obtain an alloy layer with decreasing content of the low evapn. temp. metal extending from the outer rim of the sheath layer to the core and then cooling to fix this diffusion state. Also claimed is an erosion electrode, esp. a wire electrode in which the core consists of a homogeneous alloy and the sheath layer consists of an alloy with an alloy constituent concn. decreasing inwardly towards the core.



